package com.itheima.reggie.controller;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.ShoppingCart;
import com.itheima.reggie.service.ShoppingCartService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpSession;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

@RestController
@RequestMapping("/shoppingCart")
public class ShoppingCartController {

    @Autowired
    private ShoppingCartService shoppingCartService;

    @GetMapping("/list")
    public R<List<ShoppingCart>> list() {
        Long currentId = BaseContext.getCurrentId();
        LambdaQueryWrapper<ShoppingCart> QueryWrapper = new LambdaQueryWrapper<>();
        QueryWrapper.eq(ShoppingCart::getUserId,currentId);
        List<ShoppingCart> list = shoppingCartService.list(QueryWrapper);
        return R.success(list);
    }

//    @PostMapping("/add")
//    public R<ShoppingCart> add(@RequestBody ShoppingCart shoppingCart) {
//        //设置用户id,指定是那个用户的购物车数据
//        Long currentId = BaseContext.getCurrentId();
//        shoppingCart.setUserId(currentId);
//
//        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
//        queryWrapper.eq(ShoppingCart::getUserId, currentId);
//        queryWrapper.eq(ShoppingCart::getName, shoppingCart.getName());
//        queryWrapper.eq(shoppingCart.getDishId() != null, ShoppingCart::getDishId, shoppingCart.getDishId());
//        queryWrapper.eq(shoppingCart.getSetmealId() != null, ShoppingCart::getSetmealId, shoppingCart.getSetmealId());
//        queryWrapper.eq(shoppingCart.getDishFlavor() != null, ShoppingCart::getDishFlavor, shoppingCart.getDishFlavor());
//        ShoppingCart one = shoppingCartService.getOne(queryWrapper);
//        //如果添加多个菜品套餐相同，数量＋1
//        if (one == null) {
//            shoppingCart.setNumber(1);
//            shoppingCartService.save(shoppingCart);
//        } else {
//            Integer number = one.getNumber();
//            one.setNumber(++number);
//            shoppingCartService.updateById(one);
//        }
//        return R.success(shoppingCart);
//    }

    /**
     * 添加购物车
     * @param shoppingCart
     * @return
     */
    @PostMapping("/add")
    public R<ShoppingCart> add(@RequestBody ShoppingCart shoppingCart){
        //log.info("购物车数据:{}",shoppingCart);

        //设置用户id，指定当前是哪个用户的购物车数据
        Long currentId = BaseContext.getCurrentId();
        shoppingCart.setUserId(currentId);

        Long dishId = shoppingCart.getDishId();

        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,currentId);
        queryWrapper.eq(shoppingCart.getDishFlavor()!=null,ShoppingCart::getDishFlavor,shoppingCart.getDishFlavor());

        if(dishId != null){
            //添加到购物车的是菜品
            queryWrapper.eq(ShoppingCart::getDishId,dishId);

        }else{
            //添加到购物车的是套餐
            queryWrapper.eq(ShoppingCart::getSetmealId,shoppingCart.getSetmealId());
        }

        //查询当前菜品或者套餐是否在购物车中
        //SQL:select * from shopping_cart where user_id = ? and dish_id/setmeal_id = ?
        ShoppingCart cartServiceOne = shoppingCartService.getOne(queryWrapper);

        if(cartServiceOne != null){
            //如果已经存在，就在原来数量基础上加一
            Integer number = cartServiceOne.getNumber();
            cartServiceOne.setNumber(number + 1);
            shoppingCartService.updateById(cartServiceOne);
        }else{
            //如果不存在，则添加到购物车，数量默认就是一
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartService.save(shoppingCart);
            cartServiceOne = shoppingCart;
        }

        return R.success(cartServiceOne);
    }
    /**
     * 清空购物车
     * @return
     */
    @DeleteMapping("/clean")
    public R<String> clean(){
        //SQL:delete from shopping_cart where user_id = ?

        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,BaseContext.getCurrentId());

        shoppingCartService.remove(queryWrapper);

        return R.success("清空购物车成功");
    }
}
